| (19) |
 |
|
(11) |
EP 0 367 265 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.12.1991 Bulletin 1991/51 |
| (43) |
Date of publication A2: |
|
09.05.1990 Bulletin 1990/19 |
| (22) |
Date of filing: 02.11.1989 |
|
| (51) |
International Patent Classification (IPC)5: G03G 9/087 |
|
| (84) |
Designated Contracting States: |
|
DE ES FR GB IT |
| (30) |
Priority: |
02.11.1988 JP 278105/88
|
| (71) |
Applicant: Kao Corporation |
|
Chuo-Ku
Tokyo 103 (JP) |
|
| (72) |
Inventors: |
|
- Niki, Masao
Wakayama (JP)
- Akiyama, Koji
Sakai-shi
Osaka (JP)
- Kanamaru, Yutaka
Wakayama-shi
Wakayama (JP)
|
| (74) |
Representative: Patentanwälte
Dr. Solf & Zapf |
|
Candidplatz 15
81543 München
81543 München (DE) |
|
| |
|
| (54) |
Electrophotographic dry developer |
(57) An electrophotographic dry developer comprises a carrier and toner particles comprising
a binder resin comprising (A) a polyester resin and (B) a styrene-acrylic resin obtained
by co-polymerizing a monomer having an amino group, at a weight ratio of (A) to (B)
ranging from 55:45 to 95:5, both resin (A) and resin (B) and a dyestuff or pigment
of chromatic color. It is positively charageable and serves for color electrophotography.